aarch64: Support for FEAT_CMPBR FEAT_CMPBR - Compare and branch instructions. This patch adds these instructions: - CB<CC> (register) - CB<CC> (immediate) - CBH<CC> - CBB<CC> where CC is one of the following: - EQ - NE - GT - GE - LT - LE - HI - HS - LO - LS